Production of pattern effects on acetate rayon



Patented Sept. 28, 1943 rnonnc'rron or PATTERN EFFECTS ON ACETATE RAYON Richard Walter Hardacre, Blackley, Manchester, England, assignor to Imperial Chemical Industries Limited, a corporation of Great Britain No Drawing. Application September 18, 1941, Serial No. 411x34. In Great Britain September a 3 Claims.

This invention relates to the production of pattern effects on delustred acetate rayon by a relustring process, and more Particularly the use or certain adipic acid salts in the relustrlng.

Acetate rayon which has been delustred by means other than insoluble delustrin'g inorganic compounds, e. g. titanium dioxide and barium sulphate, can be relustred by suitable treatment and this treatment when applied locally provides a convenient means of obtaining pattern efiects on a delustred ground. One of the most convenient processes which has been used for the purpose is that in whichthiodiglycol S. (CH: CH2OH)2 is printed on to the delustred material and then steamed. This process, however, has

the drawback that the relustring is liable to take' place to some extent also on layers of the rayon material adjacent to the printed parts, during the steaming stage of the process.

We have now found that ii certain adipic acid salts areused as the relustring agents, there is-no liability to th above drawback, and the process is otherwise as convenient as that with thiodiglycol.

The said salts are water-soluble salts of adipic acid and ammonia or certain amines .or pyridine or its derivatives. The amines are alkyl or alkylene derivatives or ammonia including cyclic derivatives, e. g. methylamine, diethylamine, trimethylamine, ethylenediamine, cyclohexylamine, piperidine and hexamethylenetetramine. The pyridine derivatives are its homologues and the technical mixtures sold as pyridine bases. The salts may be either the so-called neutral salts or those having free carboxylic acid or basic radicals 'as in for instanceacid ammonium adipate.

The relustring process of the invention can be employed not only for obtaining an imcoloured relustre on an uncoloured delustred ground, but also for obtaining a-coloured relustre on an un coloured delustred ground, and a relustre on a v coloured ground.

relustring is effected by treating with a. printing paste containing a salt of adipic acid as hereinbeiore defined and if desired a dyestuil for acetate rayon and then steaming.

The following examples in which parts are by weight illustrate but do not limit the invention.

Example 1 A printing paste of the following composition Thispaste is printed on'acetate rayon sateen, which has been delustred by treating with a 1% aqeuous soap solution containing 0.2% phenol at 98 C. for 2 hours. The printed material is dried, steamed for half an hour at about 100 C. in a steamer and rinsed in water. An excellent relustred effect is obtained upon a delustred background.

, Instead of using ammonium adipate, a P ridine. methylamine 'or cyclohexylamine salt of adipic acid may be used with similar results.

Example 2 A printing paste of the following composition is inadet Parts Duranol Brilliant Blue, BS 1-methylamino-4- hvdroxyethylaminoanthraquinone 4 Ammonium ad pnte 10 Water 26 *Nafka Crystal gum thickening (25%) 60 The word Naika is a registered trade-mark.

This paste is printed on to adelustred acetate rayon sateen of the kind used in Example 1, and then steamed in a similar way. A blue lustred pattern is thus obtained upon a white matt ground. Without the adipic acid a blue matt eii'ect is obtained.

Example 3 This is the sam as Example 1 except that the delustred acetate rayon sateen which is used is one which has been dyed with of Duranol Brilliant Blue CB 300 (l,4,5,8-tetraaminoanthraquinone) powder. A relustred blue effect is obtained on a delustred blue ground.

I claim:

1. Process for the production of pattern eifects on acetate rayon which has been delustred by means other than insoluble delustring inorganic compounds, by local relustring, which comprises printing local areas of said rayon with a paste containing a water soluble salt of adipic acid and then steaming the rayon.

2. Process for the production of pattern efiects on acetate rayon as defined in claim 1 in which said printing paste contains a dyestufi for acetate the watersoluble salt of adipic acid is ammonium adipate.

RICHARD WALTER HARDACRE.

CERTIFICATE OF CORRECTION. Patent No. 2,550,707; September 2 1915.

RICHARD WALTER HARDACRE.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring Correction as follows: Page l, first Column, line 14.8, for "undersirable" read -undesirable--; and second column, line 5b., after "hydroxyethylaminoanthraquinone insert ---paste--; and that the'said Letters Patent, should be read with this Correction therein that the'same may Conform to the record of the Case in the Patent Office.

Signed and sealed this 9th day of November, A. D. 1914.5.

Henry Van Arsdale, (Seal) I Acting Commissioner of Patents. 

